Measurements:
°C
°F
CURRENT WEATHER
17:25
Key West
90°F
W 9 mph
Feels like: 100°F
Precip: 5%
World Resorts USA Key West Weather

7 Day Weather Forecast

08.25
tue
DAY
90°F
W 12 mph
precip
13%
NIGHT
90°F
NW 15 mph
precip
61%
08.26
wed
DAY
90°F
NW 14 mph
precip
30%
NIGHT
92°F
W 20 mph
precip
30%
08.27
thu
DAY
90°F
NW 11 mph
precip
20%
NIGHT
90°F
W 15 mph
precip
61%
08.28
fri
DAY
90°F
NW 9 mph
precip
16%
NIGHT
90°F
W 15 mph
precip
15%
08.29
sat
DAY
90°F
NW 13 mph
precip
19%
NIGHT
90°F
W 18 mph
precip
9%
08.30
sun
DAY
90°F
NW 13 mph
precip
15%
NIGHT
92°F
W 14 mph
precip
16%
08.31
mon
DAY
90°F
NW 9 mph
precip
12%
NIGHT
92°F
W 14 mph
precip
7%

Key West Sea Water Temperature in August, °F

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Key West was 31.4°F. The maximum and minimum values were 30.6°F and 32.5°F respectively.

Key West on the Weather Map

Best Time to Visit Key West
The most sunny months:
May 17 days
March 16 days
April 16 days
The most warm months:
August 91.6 °F
July 91.0 °F
September 89.7 °F
Warmest sea temperature:
August 91.4 °F
July 90.8 °F
September 90.1 °F
The most cold months:
January 74.4 °F
February 76.3 °F
December 78.2 °F
The most rainy months:
June 7 days
August 7 days
September 6 days
The most windy months:
November 14 mph
December 14 mph
January 14 mph
more details